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Intra-Annual Variation of High and Low-Flow Extremes Associated With Land Use and Climate Change in the Upper Tekeze of the Nile River Basin

文献类型：期刊论文

作者Reda, Kidane Welde1,2,3; Liu, Xingcai1,4; Tang, Qiuhong1,2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2022-04-27
卷号127期号:8页码:16
关键词LULC change climate variability hydrological extremes land degradation Upper Tekeze basin
ISSN号2169-897X
DOI10.1029/2021JD036325
通讯作者Liu, Xingcai(xingcailiu@igsnrr.ac.cn) ; Tang, Qiuhong(tangqh@igsnrr.ac.cn)
英文摘要In northern Ethiopian highlands, climate variability and land use/land cover (LULC) change has been observed during the past decades. However, it remains unclear that to which extent and how these key drivers contributed to changes in hydrological extremes. As a case study, the respective impacts of LULC change and climate variability on hydrological extremes with respect to magnitude, duration, and frequency metrics were assessed in the Upper Tekeze basin, Ethiopia. A scenario-based approach using LULC and hydro-climatological data was developed and five simulation experiments were conducted using Soil and Water Assessment Tool model. Results showed that, during 1986-2015, low-flow duration has decreased by 5.0 days/yr, and the magnitude and occurrence of high flow has increased by 5.23 m(3)/s/yr and 5.11 days/yr, respectively. Meanwhile, about 47.42% of the landscape has changed its category while no significant change was detected in annual rainfall during the past 31 yr. Particularly, rocky area increased by 82% which was mostly contributed by losses of bare, sand, and low biomass areas. Significant positive and negative contributions to the changes in high and low-flow extremes, respectively, were detected from LULC change, while no significant contribution was detected from climate change. The increased rock area tends to be one of the major contributors to the increased high flow while climate change seemed to play a minor role. The potential mechanism is the expansion in rock area increased runoff and high flow, which may lead to significant land deterioration and loss of water storage capacity in the mountainous basin.
WOS关键词USE/LAND COVER CHANGE ; USE/COVER CHANGE ; SOIL-EROSION ; HYDROLOGICAL RESPONSES ; WATERSHED MANAGEMENT ; CHANGE IMPACTS ; ATBARA BASIN ; RAINFALL ; DEGRADATION ; VARIABILITY
资助项目National Natural Science Foundation of China[41730645] ; National Natural Science Foundation of China[41790424] ; National Natural Science Foundation of China[41877164] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20060402] ; Chinese Academy of Sciences-The World Academy of Sciences (CAS-TWAS)
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000781744400001
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences-The World Academy of Sciences (CAS-TWAS)
源URL[http://ir.igsnrr.ac.cn/handle/311030/173983]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Xingcai; Tang, Qiuhong
作者单位1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Tigray Agr Res Inst, Mekelle, Ethiopia
4.Minist Emergency Management China, Key Lab Compound & Chained Nat Hazards, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Reda, Kidane Welde,Liu, Xingcai,Tang, Qiuhong. Intra-Annual Variation of High and Low-Flow Extremes Associated With Land Use and Climate Change in the Upper Tekeze of the Nile River Basin[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2022,127(8):16.
APA Reda, Kidane Welde,Liu, Xingcai,&Tang, Qiuhong.(2022).Intra-Annual Variation of High and Low-Flow Extremes Associated With Land Use and Climate Change in the Upper Tekeze of the Nile River Basin.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,127(8),16.
MLA Reda, Kidane Welde,et al."Intra-Annual Variation of High and Low-Flow Extremes Associated With Land Use and Climate Change in the Upper Tekeze of the Nile River Basin".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 127.8(2022):16.

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来源：地理科学与资源研究所

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